Degraining doesn’t necesserily mean less detail, specially if it’s a static shot or a shot with little motion. Temporal averaging and things like that can actually improve detail, reduce video compression artifacts and film grain. As far as I know, the Lowry process is some sort of motion compensated temporal averaging and all three Star Wars original trilogy of films went through this process when they were digitally restored in 4K by Reliance Media Works. So, if the goal is to make 4K77 look closer to the 4K UHD official release, I guess temporal averaging is welcome.